- Widen the content column in steps at 1680/2400/3400px so 1440p-4K monitors
get real layout instead of a 1200px strip; header brand aligns with it.
- Calendar: months flow as a responsive multi-column grid (year-at-a-glance
on desktop, single column on phones); the time-filter panel spans the
content width as one row (Range | Seasons/Years/Weather) on desktop;
category-totals strip widened to 720px.
- Day: metric ladder cards lay out 2-up from 1000px (3-up at 4K).
- Weekly: the calendar CTA is a compact button (sub-line removed); the trend
chart's drawing width now tracks its container (~1.5 CSS px per SVG unit,
redrawn on resize) so wide screens gain plot room instead of magnification.
- Compare: scope the rank-bar segment colors to .cmp-seg — the bare
.cmp-comfort rule was painting a green box behind the comfort slider.
- Calendar/Compare From-To month inputs open the native month picker on
click (input.showPicker, ignored where unsupported).
- CLAUDE.md: require validating design changes at mobile/tablet/1080p/2K/4K.